arXiv is a free distribution service and an open-access archive for nearly 2.4 million scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.
The Open Textbook Library features textbooks that are funded, published, and licensed for free use, adaptation, and distribution. These textbooks have been reviewied by faculty from various colleges and universities.
The Open Textbook Library features textbooks that are funded, published, and licensed for free use, adaptation, and distribution. These textbooks have been reviewied by faculty from various colleges and universities.
ScienceDirect is the world's leading source for scientific, technical, and medical research. Explore journals, books and articles, including over 3.3 million open access articles.
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OpenStax is the world’s largest publisher of open education resources (OER) and a provider of interactive learning technologies and education research for high school and college.